<html>

<head>
    <title>HTML 文档结构 </title>
</head>
<link rel="stylesheet" href="Iindex.css">#连接css
<style>
    body{
        display: flex;
        justify-content: center;
        align-items: center;
    }
    .main{
        background-color: aquamarine;
        width: 200px;
        height: 200px;
    }
    p{
        background-color: blue;
        font-size: 20;
    }
</style>
<body>
   <div class="main">
    <span style="color: blueviolet;">口语考试</span>
    <p>
        哈哈哈
    </p>
   </div>
</body>
</html>